Cut the chicken breasts into 8 to 10 strips about 1 1/2 inches long.,Shell and devein the shrimp.,Rinse well and drain.,Heat 1 tablespoon of the butter in a small saucepan.,Add the onion and garlic.,Cook briefly and add the celery.,Cook, stirring, for about 1 minute.,Do not brown.,______,Add the tomatoes, banana, apples and bay leaf.,Stir and add the broth, salt and pepper.,Stir well to blend.,Simmer 10 minutes.,Heat the remaining butter in a nonstick skillet and add the chicken, stirring.,Cook for 3 minutes.,Add the shrimp, salt and pepper.,Cook, stirring, about 2 minutes.,Meanwhile, remove the bay leaf and pour the curry mixture into the container of a food processor or blender.,Blend to a fine texture.,Add the grapes to the chicken mixture.,Pour the curry sauce over it and stir to coat well.,Bring to a simmer for about 2 minutes.,Sprinkle with the coriander, stir and serve immediately.